Symmetry breaking induced excitations of dark plasmonic modes in multilayer graphene ribbons

Dai, Yunyun; Chen, A; Xia, Yuyu; Han, Dezhuan; Liu, X H; Shi, Lei; Zi, Jian

doi:10.1364/oe.24.020021

Cited by 12 publications

(2 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Zhang et al and Guo et al reported that different higher-order plasmon modes of patterned graphene acting as narrow modes interact with a broad dipolar mode to generate different higher-order FRs in pure graphene or hybrid graphene-metal metamaterials [27,32]. On the other hand, plasmon hybridization among neighboring graphene structures is an effective way to generate new narrow hybridized plasmon modes through optical near-field coupling [33][34][35]. A previous effort was focused on achieving the narrow electric dipole symmetric and antisymmetric modes by plasmon hybridization in a stacked graphene nanoribbon pair, and the formation mechanism of double FRs in a symmetrical structure of a graphene-metal metamaterial [36].…”

Section: Introductionmentioning

confidence: 99%

Graphene Multiple Fano Resonances Based on Asymmetric Hybrid Metamaterial

Yan

Zhang

et al. 2020

Nanomaterials

View full text Add to dashboard Cite

We theoretically investigate multiple Fano resonances in an asymmetric hybrid graphene–metal metamaterial. The multiple Fano resonances emerge from the coupling of the plasmonic narrow bonding and antibonding modes supported by an in-plane graphene nanoribbon dimer with the broad magnetic resonance mode supported by a gold split-ring resonator. It is found that the Fano resonant mode with its corresponding dark mode of the antibonding mode in the in-plane graphene nanoribbon dimer is only achieved by structural symmetry breaking. The multiple Fano resonances can be tailored by tuning the structural parameters and Fermi levels. Active control of the multiple Fano resonances enables the proposed metamaterial to be widely applied in optoelectronic devices such as tunable sensors, switches, and filters.

show abstract

Section: Introductionmentioning

confidence: 99%

Graphene Multiple Fano Resonances Based on Asymmetric Hybrid Metamaterial

Yan

Zhang

et al. 2020

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…The method has been successfully applied to graphene sheets and ribbons. [11][12][13][14][15][16][17][18][19][20][21] To tune graphene plasmonic resonances, electrical gating has been dominantly used. [35,36] Moreover, intrinsic absorptions from either conducting substrates or ion gels are inevitable, which may degrade considerably graphene plasmonic resonances.…”

mentioning

confidence: 99%

Dynamical Tuning of Graphene Plasmonic Resonances by Ultraviolet Illuminations

Dai

Xia

Jiang

et al. 2018

Advanced Optical Materials

View full text Add to dashboard Cite

has some disadvantages. To realize a dynamical tuning, graphene structures should have electrical connections. As a result, electrodes, ion gels, or conducting substrates have to be introduced to attain an electrical connection. The method has been successfully applied to graphene sheets and ribbons. However, it is especially difficult and challenging for isolated graphene structures such as graphene disks. [35,36] Moreover, intrinsic absorptions from either conducting substrates or ion gels are inevitable, which may degrade considerably graphene plasmonic resonances. Thus, to find a way to tune plasmonic resonances in all kinds of graphene structures without the introduction of electrical connections is of great significance.In this paper, we develop a simple and efficient method to tune graphene plasmonic resonances by UV illuminations. We show that UV illuminations can induce a dynamical tuning of plasmonic resonances in all kinds of graphene structures both with and without electrical connections. Factors that influence this tuning process including the operating wavelength, power density, and illumination time of UV light sources are discussed.Plasmonic resonances in both graphene and graphene structures depend strongly on their Fermi levels, [4] E F . Consequently, a variation of the Fermi level can lead to a change in plasmonic resonances. To show UV illuminations can induce a change in the Fermi level, we measure the response of resistance and transmission spectra of graphene samples on an insulating BaF 2 substrate. The UV source used is a 355 nm solid-state laser. Figure 1a shows the resistance οf graphene changing with time upon UV illuminations at different power densities. Once the UV laser is switched on, the resistance undergoes an increase with time and reaches saturated values a few minutes later. If switching off the UV laser, the resistance decreases with time and resumes the original values without UV illuminations eventually. Obviously, the larger the power density of the UV laser is, the higher the resistance is. Correspondingly, the resuming time needed after switching off the UV laser is more. Physically, a change in resistance means a variation of the carrier concentration in graphene samples induced by UV illuminations. A higher resistance corresponds to a lower carrier concentration, implying a lower Fermi level. Thus, the time-dependent resistance measurements show unambiguously that the Fermi level of graphene can be modified by UV illuminations in a dynamical and reversible way. One of the unique features of plasmonic resonances in graphene structuresis the enabled tunability through external means. Up to now, electrical gating is extensively adopted to tune graphene plasmonic resonances. This method is, however, limited unfortunately only to graphene structures with electrical connections. Here, a simple and efficient method to tune graphene plasmonic resonances by ultraviolet illuminations in a dynamical and reversible way is demonstrated. It is purely an optical means and can be a...

show abstract

Tunable dualband light trapping and localization in coupled graphene grating-sheet system at mid-infrared wavelengths

Ding

et al. 2018

Optics Communications

View full text Add to dashboard Cite

Symmetry breaking induced excitations of dark plasmonic modes in multilayer graphene ribbons

Cited by 12 publications

References 42 publications

Graphene Multiple Fano Resonances Based on Asymmetric Hybrid Metamaterial

Graphene Multiple Fano Resonances Based on Asymmetric Hybrid Metamaterial

Dynamical Tuning of Graphene Plasmonic Resonances by Ultraviolet Illuminations

Tunable dualband light trapping and localization in coupled graphene grating-sheet system at mid-infrared wavelengths

Contact Info

Product

Resources

About